

“SEE...The Miracles of Science the "lab" blood test x-ray and ultra-violet ray track down a murderer!”
When a Broadway playboy is found dead, it's up to detective Jim Stevens to pick the murderer out of several likely candidates.
Theodore Newton
Jack Winton

Murray Kinnell
Horton

Hobart Cavanaugh
Muggs Manton

Hugh Herbert
Manny Wales

Henry O'Neill
Inspector Donnelly

Dorothy Burgess
Dolly White

Frank Darien
Manley

Kenneth Thomson
Gordon Bates

Ken Murray
Mac

Spencer Charters
Teletype Man (uncredited)

Al St. John
Detainee Touching Cigarette Pack (uncredited)

Ben Taggart
Third-Degree Detective (uncredited)

Matt McHugh
Man picked up by police wagon (uncredited)